#include<iostream>
using namespace std;
int main(void){
	string str = "";
	cin>>str; 
    for(int i = 0;i<str.size();i++){
		if(str[i] == 'Z'){
			str[i] = 'A';
		}
		else if(str[i] == 'z'){
			str[i] = 'a';
		}
    	else if((str[i] >= 'A'&& str[i] <= 'Y')|| (str[i] >= 'a' && str[i] <= 'y'))
			str[i] = str[i] + 1;
    }
    cout<<str;
	return 0;
}
